Twisting spindle, especially for artificial silk



. Aug. 6, 1940. I I BOCHMANN TWISTING SPINDLE, ESPECIALLY FOR ARTIFICIAL SILK Filed March 5, 1938 I hvenfor:

Patented Aug. 6, 1940 f 2,210,358

UNITED STATES PATENT OFFICE 'IWIS'IING SIINbLE, ESPECIALLY FOR ARTIFICIAL SILK Otto Bochmann, Remscheid-Lennep, Germany,

assignor to Barmer Maschinenfabrik Aktiengesellschaft, Wuppertal-Obcrbarmen, Germany Application March a, 1938, Serial N0. 193,655

In Germany December 24, 1936 2 Claims. (01. cos-152) This invention relates to a, twisting spindle for nected with the stationary part of the collar bearslip-on bodies with great mass accumulated ing, the bearing parts arranged within the bell for around the central axis of the spindle, for excarrying large ma e and their resilient connecamplc wooden bobbins, flanged bobbins or the like tion being according to the invention situated be- 6 with artificial silk. In spindles loaded in this low the rotating mass, an upwardly projecting manner a displacement of the ideal axis takes spindle shank being arranged for receiving the place through a certain angle corresponding to bobbins. The spring connecting the two station-' the centrifugal forces generated. In these spinry be rin parts is preferably a tension spring, so dles the theory of gyration must therefore be th t tWO Parts are Pulled the One against e 10 takenas abasis, that is the rotating mass mustbe other and which mutually support one another 10 capable of displacement in sucha manner that through the ediary of a dampi meansthe centre of gravity returns into the ideal axis. The two bearing parts might, however, bemade in In a spindle loaded in this sense the dynamic one piece which is constructed as a helical spring centrifugal forces do not extend through the below the foot bearing. It is also advantageous to centre of gravity of the rotating mass but at a connect the spindle bell with the downwardly ll certain angular displacement of the axis or of drawn neck bearing by a key and groove connecthe spindle shank, the lines intersect directly betion which allows the spindle to move in an axial low the rotating mass body. direction so that the axial impacts are taken up Spindles have become known which, besides by the resilient connection of the bearing parts.

so having a foot bearing directly below the rotating This spindle construction possesses the advanso mass, have also a collar bearing drawn down in tage thatthe mass set thereon can adjust itself bell shape, the bell serving as driving wharve. in the ideal axis according to the centrifugal However, in these known spindles the stationary forces which occur. The spindle, in this construcbearing part is rigid for accommodating the spintion, is capable of yielding to these centrifugal dle shank so that no gyration can occur here. forces without hindrance, that is,- the rotating 25 This, however, results in unsteady running of the mass can automatically displace itself according spindle, very heavy stressing of the bearing and to the. theory of gyration so that the centre 'of consequently short life of the bearing and congravity moves into the ideal axis. This is attinually increasing consumption of power. tained by the resilient connection between the two Spindles are also known, in-which the stabearing parts being located directly below the roso tionary bearing part is rendered elastic by a tating mass. Another advantage of this conspring or a similar device, this elastic connection struction is, that such a spindle runs absolutely being, however, located in the interior of the yarn steadily at any speed of rotation so that on the body. The result of this arrangement is, that. one hand the bearings are stressed less heavily the yarn body which has unbalanced moments and consequently last longer and on the other as along its entire length is unable to adjust itself hand considerably less power is required. into the ideal axis of rotation when running. All An embodiment of the invention is illustrated unbalanced moments which are above the elastic by way of example in longitudinal section in the connection would'be capable of adjusting themonly figure of the accompanying drawing.

40 selves, but all those located below the elastic con- The spindle shank I, which in the example illus- 4o nection are incapable of so doing. The result is, V trated carries a large flanged bobbin 2, is mounted that the spindle does not become steady when in a foot bearing 3 constructed as a roller bearrunningbut swirls, so that on the one hand the ing directly below the mass. The stationary bearings are much more heavily stressed and bearing part carrying the foot bearing 3 is con- 5. their life is considerably shortened and on the nected with another stationary bearing part 5 by other hand such a spindle consumes much more a spring 6 with open coils, a damper I being arpower. ranged between the two bearing parts. This re- The object of the inventionis, to avoid these silient connection is arranged directly below the objections on spindles which are to be employed flanged bobbin 2. The bell 8 rigidly connected to for the above mentioned mass bodies. with the spindle shank I and serving as driving The invention consists in that in .a twisting wharve is supported on the lower part ill of the spindle with a foot bearing also an oscillatable spindle by a collar bearing 9. Owing to this concollar bearing drawn downwards in bell-shape bestruction the spindle can adjust itself according-to low the foot bearing exists and the bearing part the gyrating effect, in that the connection spring for the root bearing is freely oscillatably conand the oscillatable bearing can yield to the dis- 5 placement which occurs. To avoid any unsteadiness it is advisable, to arrange" between the two bearing par-ts the damper which consists for instance of a felt disc or the like. It is further advisable to avoid the spindle point resting upon a support; in the present instance the spindle point is supported by the drawn down collar bearing.

I claim:

1. A twisting spindle for carrying large rotating masses, such as wooden bobbins, flanged bobbins and the like with artificial silk, comprising in combination a fixed lower spindle part, a downwardly directed bell-shaped part surrounding the upper end of said lower spindle part, acollar bearing- 35 nd bearing part and rotatably guiding the lower end of said spindle shank, and a helical tension spring embracing and thus resiliently connecting the two bearing parts.

2. A twisting spindle for carrying large rotating masses, such as wooden bobbins, flanged bobbins and the like with artificial silk, comprising in combination a fixed lower spindle part, a downwardly directed bell-shaped part surrounding the upper end ofsaid lower spindle part, a collar bearing oscillatably' and rotatably supporting said the upper endoi. said bell-shaped part and rotatable therewith, a bearing part on the upper end of the lower spindle part, a second bearing part in the upper end of said bell-shaped part and supported by said first mentioned bearing part, a foot roller bearing fitted in the upper end of said second bearing part and rotatably guiding the lower end of said spindle shank, a helical tension spring embracing and thus resiliently connecting the two bearing parts, and a shock absorbing device interposed between the two bearing parts O'I'IO BOCI-IMANN. 

